The Effect of Weighted Contact Lens on Physiological Nystagmus in Young Healthy Subjects
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Abstract
Background and Aim: Contact lenses correct the visual functioning of patients with low vision due to congenital nystagmus. This research presents a new method to reduce nystagmus using contact lenses in healthy subjects.
Methods: Thirty-three normal people (13 women, 20 men) aged 18 to 25 with an average age of 23.3 years participated in this study. In the studied subjects, nystagmus was evoked by an optokinetic stimulus. Then, it was measured and recorded. Next, the Conventional Contact Lens (CCL) and a special lens that was designed and made heavier than the conventional lenses were placed in the eyes of the participants. Once again, nystagmus was recorded with the optokinetic stimulus while the contact lens was placed in the participant’s eyes.
Results: No significant difference was observed for the Slow Phase Velocity (SPV) and gain of nystagmus with and without CCL (p>0.05), but this parameter had a significant difference with and without Weighted Contact Lenses (WCL) (p<0.05). Also, the comparison between the two lenses demonstrated a significant difference (p<0.05), which indicates the positive effect of the WCL in reducing the SPV and gain of nystagmus.
Conclusion: Using weighted contact lenses can significantly reduce the SPV and gain of optokinetic nystagmus in healthy subjects. Investigating the effect of this lens in inhibiting pathological nystagmus is recommended in future research.
[2] Lemos J, Strupp M. Central positional nystagmus: an update. J Neurol. 2022;269(4):1851-60. [DOI:10.1007/s00415-021-10852-8]
[3] Sarvananthan N, Surendran M, Roberts EO, Jain S, Thomas S, Shah N, et al. The prevalence of nystagmus: The Leicestershire nystagmus survey. Invest Ophthalmol Vis Sci. 2009;50(11):5201-6. [DOI:10.1167/iovs.09-3486]
[4] Rucker JC. Current treatment of nystagmus. Curr Treat Options Neurol. 2005;7(1):69-77. [DOI:10.1007/s11940-005-0008-0]
[5] Abel LA. Infantile nystagmus: current concepts in diagnosis and management. Clin Exp Optom. 2006;89(2):57-65. [DOI:10.1111/j.1444-0938.2006.00024.x]
[6] Abadi RV, Bjerre A. Motor and sensory characteristics of infantile nystagmus. Br J Ophthalmol. 2002;86(10):1152-60. [DOI:10.1136/bjo.86.10.1152]
[7] Thurtell MJ, Leigh RJ. Therapy for nystagmus. J Neuroophthalmol. 2010;30(4):361-71. [DOI:10.1097/WNO.0b013e3181e7518f]
[8] Stahl JS, Plant GT, Leigh RJ. Medical treatment of nystagmus and its visual consequences. J R Soc Med. 2002;95(5):235-7. [DOI:10.1258/jrsm.95.5.235]
[9] Abadi RV, Carden D, Simpson J. A new treatment for congenital nystagmus. Br J Ophthalmol. 1980;64(1):2-6. [DOI:10.1136/bjo.64.1.2]
[10] Blechschmidt T, Krumsiek M, Todorova MG. The Effect of Acupuncture on Visual Function in Patients with Congenital and Acquired Nystagmus. Medicines. 2017;4(2):33. [DOI:10.3390/medicines4020033]
[11] Hale JR. Contact-lens application in four cases of congenital nystagmus. Optom Wkly. 1962;53:1865-8.
[12] Abadi RV. Visual performance with contact lenses and congenital idiopathic nystagmus. Br J Physiol Opt. 1979;33(3):32-7.
[13] Allen ED, Davies PD. Role of contact lenses in the management of congenital nystagmus. Br J Ophthalmol. 1983;67(12):834-6. [DOI:10.1136/bjo.67.12.834]
[14] Biousse V, Tusa RJ, Russell B, Azran MS, Das V, Schubert MS, et al. The use of contact lenses to treat visually symptomatic congenital nystagmus. J Neurol Neurosurg Psychiatry. 2004;75(2):314-6. [DOI:10.1136/jnnp.2003.010678]
[15] Dell’osso LF. Contact lenses and congenital nystagmus. Vision Sci. 1988;3:229-32.
[16] Golubović S, Marjanović S, Cvetković D, Manić S. The application of hard contact lenses in patients with congenital nystagmus. Fortschr Ophthalmol. 1989;86(5):535-9.
[17] Matsubayashi K, Fukushima M, Tabuchi A. Application of soft contact lenses for children with congenital nystagmus. Neuroophthalmology. 1992;12(1):47-52. [DOI:10.1080/016581071992.11978667]
[18] Jones-Jordan LA, Walline JJ, Mutti DO, Rah MJ, Nichols KK, Nichols JJ, et al. Gas permeable and soft contact lens wear in children. Optom Vis Sci. 2010;87(6):414-20. [DOI:10.1097/OPX.0b013e3181dc9a04]
[19] Solis RA. Nystagmus and soft lenses. J Am Optom Assoc. 1976;47(7):980.
[20] Jayaramachandran P, Proudlock FA, Odedra N, Gottlob I, McLean RJ. A randomized controlled trial comparing soft contact lens and rigid gas-permeable lens wearing in infantile nystagmus. Ophthalmology. 2014;121(9):1827-36. [DOI:10.1016/j.ophtha.2014.03.007]
[21] Sharma P, Tandon R, Kumar S, Anand S. Reduction of congenital nystagmus amplitude with auditory biofeedback. J AAPOS. 2000;4(5):287-90. [DOI:10.1067/mpa.2000.107900]
[22] Dell’osso LF. Development of New Treatments for Congenital Nystagmus. Ann N Y Acad Sci. 2002;956(1):361-79. [DOI:10.1111/j.1749-6632.2002.tb02834.x]
[23] Jafarzadeh S, Bahrami E, Pourbakht A, Jalaie S, Daneshi A. Validity and reliability of the Persian version of the dizziness handicap inventory. J Res Med Sci. 2014;19(8):769-75.
[24] Hsu WY, Cheng YW, Tsai CB. An Effective Algorithm to Analyze the Optokinetic Nystagmus Waveforms from a Low-Cost Eye Tracker. Healthcare (Basel). 2022;10(7):1281. [DOI:10.3390/healthcare10071281]
[25] Essig P, Müller J, Wahl S. Parameters of Optokinetic Nystagmus Are Influenced by the Nature of a Visual Stimulus. Appl Sci. 2022;12(23):11991. [DOI:10.3390/app122311991]
[26] Byford GH. A Sensitive Contact Lens Photoelectric Eye Movement Recorder. IRE Transactions on Bio-Medical Electronics. 1962;9(4):236-43. [DOI:10.1109/TBMEL.1962.4323015].
[27] Safran AB, Gambazzi Y. Congenital nystagmus: rebound phenomenon following removal of contact lenses. Br J Ophthalmol. 1992;76(8):497-8. [DOI:10.1136/bjo.76.8.497]
| Files | ||
| Issue | Vol 32 No 4 (2023) | |
| Section | Research Article(s) | |
| DOI | https://doi.org/10.18502/avr.v32i4.13593 | |
| Keywords | ||
| Nystagmus optokinetic nystagmus weighted contact lens | ||
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